When a 6.7L Cummins starts hard, smokes white at idle, dumps fuel mileage, or throws a misfire code, the injectors are usually the first suspect. These are common rail piezo and solenoid units that fire at extreme pressure thousands of times a minute, so wear, internal leakage, and clogged nozzles are part of the deal once you pass 150,000 miles. Picking the right set matters because the wrong injector can wash a cylinder, hurt your turbo, or leave power on the table.
We looked at OEM grade Bosch replacements for stock trucks, balanced and blueprinted sets for guys who want factory drivability back, and oversized performance nozzles for tuned builds chasing big numbers. Below are seven real injector options for the 2007.5 to present 6.7 Cummins, ranked by build quality, consistency, and how confidently we would bolt them into our own truck.
| Photo | Product | Score | Buy |
|---|---|---|---|
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Bosch 0986435518 Common Rail Fuel Injector for 6.7L Cummins Best Overall OEM Bosch stock replacement, plug and play for 2007.5 to 2018 6.7L Cummins |
9.5 | 🛒 Check Price |
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Exergy New 60% Over Injectors for 6.7L Cummins Best Performance New 60 percent over nozzles, sold as a matched and flow balanced set of six |
9.4 | 🛒 Check Price |
|
Industrial Injection Reman Stock Injector for 6.7L Cummins Best Remanufactured Remanufactured to OEM spec, individually flow evaluated and balanced |
9.2 | 🛒 Check Price |
|
Dynomite Diesel DDP Stock Replacement Injector for 6.7L Cummins Best for Daily Drivers Stock flow replacement, individually balanced and dyno verified |
9.0 | 🛒 Check Price |
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BD Diesel Premium Stock Injector for 6.7L Cummins Best Warranty Support OEM spec stock replacement with manufacturer backed coverage |
8.8 | 🛒 Check Price |
 |
S&S Diesel Motorsport New Stock Injector for 6.7L Cummins Best Brand New Stock New construction stock replacement, precision flow matched |
8.6 | 🛒 Check Price |
 |
Industrial Injection Race Series Injector for 6.7L Cummins Best for Big Builds Oversized performance nozzles, flow matched set for tuned engines |
8.4 | 🛒 Check Price |
1. Bosch 0986435518 Common Rail Fuel Injector for 6.7L Cummins: Best Overall
If your 6.7 is a daily driver, a tow rig, or a work truck and you just want it to run like the day it left the factory, the Bosch 0986435518 is the safest set you can install. Bosch builds the original injectors for the Cummins common rail platform, so this unit drops in with the exact flow rate, atomization, and electrical signature the ECM expects. There is no tuning, no balance rates to chase, and no smoke or rattle that comes from mismatched aftermarket nozzles. For most owners replacing tired high mileage injectors, this is the correct answer.
The honest weakness is that it gives you nothing extra. This is a stock injector, so if you are chasing horsepower or running aggressive tuning, you will be leaving performance on the table and may even out flow it under heavy fuel. It is also sold one at a time, so a full replacement means six injectors and the labor that goes with a complete job. As a pure restore to factory choice, though, it is hard to beat.
- Genuine Bosch internals matched to factory flow and spray pattern
- Direct fit replacement requiring no tuning changes
- Backed by Bosch quality control and remanufacturing standards
Pros: True OEM grade reliability and drivability; No risk of over fueling or smoke on a stock truck; Widely trusted by Cummins shops and dealers
Cons: No power gain over factory since it matches stock flow; Sold individually so a full set means buying six
2. Exergy New 60% Over Injectors for 6.7L Cummins: Best Performance
Exergy has earned a serious reputation in the diesel performance world, and their 60 percent over injectors for the 6.7 Cummins are a favorite for trucks pushing big numbers on a built short block and upgraded fuel system. Unlike a lot of the market, these are new units rather than remanufactured cores, and every set ships flow matched so all six cylinders fire identically. That consistency is what keeps a high power engine smooth instead of rattling and surging, and it is why competition and sled pull crowds keep coming back to Exergy.
The catch is that this is not a casual upgrade. Sixty percent over nozzles need supporting mods and proper custom tuning to behave, and on a stock truck they will smoke, run rich, and waste fuel. You also need a CP3 or fuel system that can keep rail pressure up under that demand. Put them in the right build with the right calibration, though, and they deliver clean, repeatable power that cheaper performance injectors cannot match.
- Brand new bodies, not remanufactured cores
- Custom oversized nozzles for high horsepower builds
- Each set flow matched and balanced as a group
Pros: Supports very high power on built engines; New construction means long service life; Excellent flow consistency across all six
Cons: Requires custom tuning to run correctly; Far more injector than a stock or mild truck needs
3. Industrial Injection Reman Stock Injector for 6.7L Cummins: Best Remanufactured
Industrial Injection is among the most respected names in the Cummins world, and their remanufactured stock injectors are a smart middle ground for owners who want OEM grade results without paying for all new units. Each injector is torn down, fitted with new nozzles and wear parts, then flow evaluated and balanced on their own equipment before it goes out the door. That testing is the real value here, because a properly balanced set means no rough idle, no chasing a single dead hole, and fuel economy that returns to where it should be.
The trade off is simply that these are rebuilt cores, not new injectors, so a small slice of buyers will always prefer factory new internals for confidence on the road. There is also the usual reman friction of dealing with a core charge and returning your old units. For a stock or lightly tuned 6.7 that needs honest, evaluated injectors from a shop that lives and breathes Cummins, this is a reliable choice.
- Rebuilt and evaluated in house to factory tolerances
- New nozzles and internal components during reman
- Flow data verified before the unit ships
Pros: Restores factory drivability and economy; Strong reputation and support from a diesel specialist; Evaluated consistency reduces balance rate issues
Cons: Remanufactured rather than brand new; Core charge handling can be a hassle
4. Dynomite Diesel DDP Stock Replacement Injector for 6.7L Cummins: Best for Daily Drivers
Dynomite Diesel, often shortened to DDP, builds injectors that strike a nice balance between quality and approachability for the everyday 6.7 Cummins owner. Their stock replacement set keeps factory flow so your tuning, emissions equipment, and drivability stay exactly where Ram intended, and each set is balanced so all six cylinders behave the same. The result on a worn out truck is an immediate return of quiet idle, clean starts, and the fuel mileage you had been slowly losing as the old injectors aged.
Because these are stock flow, they will not add power, and anyone hoping a new set alone will wake up the truck should set that expectation aside. We also noticed availability for certain model years can come and go, so you may need to confirm fitment before ordering. For a clean, no drama restore on a daily driven or towing 6.7, DDP is a dependable pick from a shop people trust.
- Balanced as a set for smooth multi cylinder operation
- Stock flow keeps factory tuning and emissions happy
- Evaluated on Dynomite equipment before shipping
Pros: Smooth idle and quiet running from balanced sets; Drop in fit with no tuning required; Good support from a known performance shop
Cons: Stock flow offers no added power; Availability can vary by application year
5. BD Diesel Premium Stock Injector for 6.7L Cummins: Best Warranty Support
BD Diesel has been making diesel performance and replacement parts for a long time, and their premium stock injectors for the 6.7 Cummins are aimed squarely at owners who value support and coverage as much as the part itself. These are built to OEM flow and evaluated before they ship, so you get the same plug and play, no tuning behavior as the other stock options on this list. Where BD stands out is the company behind the part, with a customer support network that can make a warranty situation much less stressful if a unit ever acts up.
In terms of raw injector pedigree, BD is not as singularly focused on injectors as a shop like Industrial Injection or Exergy, so some hardcore Cummins owners reach for those names first. And like every stock option here, there is no power on the table. But if backing, support, and a straightforward factory restore are what you care about, BD is a genuinely solid and dependable choice.
- Built to factory flow and spray characteristics
- Quality control testing before shipment
- Backed by BD Diesel customer support
Pros: Solid warranty and support reputation; Direct fit with no calibration changes; Consistent factory style drivability
Cons: No performance gain over stock; Less name recognition than the top injector specialists
6. S&S Diesel Motorsport New Stock Injector for 6.7L Cummins: Best Brand New Stock
S&S Diesel Motorsport is a fuel system specialist, and that focus shows in their stock replacement injectors for the 6.7 Cummins. The big draw is that these are new construction rather than remanufactured cores, which gives buyers who simply do not trust rebuilt internals a clean, all new option that still runs factory flow. The flow matching is tight, so cylinders fire evenly and the truck idles and starts the way a healthy 6.7 should, with none of the rattle that comes from a poorly matched set.
The honest limitation is the same one that applies to any stock injector, which is that you get factory power and nothing more. We also found that stock fitment availability can be a little limited compared with the biggest sellers, since S&S puts a lot of energy into their high performance and motorsport offerings. For an owner who wants brand new injectors at stock flow from a serious fuel system house, though, this set delivers.
- All new injector bodies rather than remanufactured cores
- Tight flow matching across the set
- Built by a shop focused on injection and fuel systems
Pros: New units instead of rebuilt cores; Excellent flow precision for smooth running; Strong fuel system expertise behind the brand
Cons: Stock flow means no extra power; Stock fitment options can be limited at times
7. Industrial Injection Race Series Injector for 6.7L Cummins: Best for Big Builds
For owners building a serious 6.7 Cummins, the Industrial Injection Race Series oversized injectors bring the extra fuel needed to chase real horsepower. These use larger nozzles to move far more fuel than stock, and like the company’s reman line they are flow matched as a set so a high power engine stays smooth rather than stumbling on one rich or lean cylinder. Paired with the right turbo, fuel supply, and tuning, they let a built engine make numbers that stock injectors simply cannot support.
The clear weakness is that these belong only in a built and properly tuned truck. Drop them into a stock 6.7 and you will get smoke, a rich messy idle, and wasted fuel, and you also need an upgraded CP3 or stout fuel system to feed them under load. Treat them as one piece of a complete performance plan rather than a standalone upgrade, and they reward you with strong, repeatable power from a shop that knows Cummins injection inside and out.
- Larger nozzles for significant fuel delivery gains
- Flow matched and balanced as a complete set
- Engineered for high horsepower 6.7 builds
Pros: Big power potential on a supported build; Consistent flow across all six injectors; Backed by a top Cummins injection shop
Cons: Requires custom tuning and supporting fuel mods; Poor fit for a stock or mild truck
Frequently Asked Questions
How do I know if my 6.7 Cummins injectors are going bad?
Classic warning signs include hard or extended cranking before the engine catches, white or gray smoke at idle that does not clear, a rough or surging idle, a noticeable knock or rattle from one area of the engine, dropping fuel economy, and check engine codes for misfires or cylinder balance. Raw fuel smell or fuel diluting your engine oil is a more serious symptom that means an injector is leaking internally. If you see several of these together, especially past 150,000 miles, it is worth having the injectors flow evaluated or the balance rates read on a scan tool before they damage a piston or your turbo.
Should I replace all six injectors at once or just the bad one?
Most experienced Cummins shops recommend replacing all six as a balanced set rather than chasing one cylinder at a time. The 6.7 fires its injectors in concert, and the ECM watches cylinder balance, so mixing one fresh injector with five worn units often leads to uneven running and frustrating balance rate readings. The injectors also share the same mileage, fuel quality, and wear history, so when one fails the others are usually not far behind. Doing the job once with a matched set saves you tearing the engine back down a few months later and gives the smoothest result.
Do I need tuning after installing new injectors on my 6.7 Cummins?
It depends entirely on what you install. Stock flow replacement injectors, like the Bosch OEM units or balanced reman and stock sets, are plug and play and need no tuning since they match factory flow and spray pattern. Oversized performance injectors, such as 60 percent over or race series nozzles, absolutely require custom tuning so the ECM commands the right fuel for the larger nozzles. Without proper tuning, performance injectors will smoke, run rich, foul up your aftertreatment, and can even hurt reliability, so always plan tuning and supporting fuel mods into any big injector upgrade.
Will bigger injectors add horsepower to a stock 6.7 Cummins?
Not by themselves, and not safely on a stock truck. Bigger injectors only help when the rest of the system can use the extra fuel, meaning an upgraded CP3 or fuel supply to hold rail pressure, a turbo that can handle the added air and fuel, and custom tuning to command it all correctly. On an otherwise stock 6.7 they mostly create smoke and waste fuel while putting extra heat into a stock turbo and pistons. If your truck is stock and you simply want it healthy again, stock flow injectors are the right call, and power upgrades should come as part of a planned build.
Are remanufactured injectors as good as new ones for the 6.7 Cummins?
A quality remanufactured injector from a reputable shop can perform very close to new, and for many owners it is the smart value choice. The key is who does the reman. Top shops install new nozzles and wear components, then flow test and balance every unit before it ships, which restores factory drivability and economy. The difference compared to a new injector usually comes down to the body and core having prior service life, which is why some buyers still prefer brand new construction for maximum confidence on the road. If you go reman, buy from a respected Cummins injection specialist rather than an unbranded core.
Our Verdict
For the vast majority of 6.7 Cummins owners who want a healthy, factory running truck, our top pick is the Bosch 0986435518 OEM injector. It restores stock drivability, economy, and reliability with zero tuning and zero drama, which is exactly what most people need when their injectors wear out. If you are building a high power truck instead, the Exergy 60 percent over set is our runner up and the one to bolt into a properly tuned and supported engine, delivering clean, consistent power that cheaper performance injectors cannot match. Match the injector to your build, replace all six as a balanced set, and your 6.7 will reward you with miles of smooth, dependable running.
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